flipperdevices/flipperzero-firmware
Dec 2024 – Apr 2025
3 Months active
Languages Used
C
Technical Skills
CryptographyData ParsingEmbedded SystemsNFCReverse EngineeringBluetooth Low Energy (BLE)
Eric Betts
PROFILE
Eric Betts
During their three-month contribution to flipperdevices/flipperzero-firmware, Bettse engineered robust enhancements across BLE and NFC features using C and embedded systems expertise. They developed a Disney Infinity NFC card reading plugin, implementing UID-based key derivation to streamline card processing within the firmware. Bettse also improved BLE interoperability by supporting longer UUIDs, expanding manufacturer data handling, and refining pairing logic for more secure device connections. Additionally, they addressed Skylander ID parsing reliability by introducing CRC64-like hashing and optimizing data extraction. Their work demonstrated depth in cryptography, data parsing, and firmware development, resulting in more reliable, maintainable, and extensible device communication capabilities.
Overall Statistics
Feature vs Bugs
67%Features
Repository Contributions
4Total
Bugs
1
Commits
4
Features
2
Lines of code
255
Activity Months3
Your Network
24 people
Work History
April 2025
2 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for flipperdevices/flipperzero-firmware focused on robust BLE improvements and data handling to enhance interoperability and reliability across BLE peripherals. Key changes include support for longer UUIDs in advertising, enablement of manufacturer-specific data handling, and refined pairing with conditional security requests. The mfg_data buffer sizing was increased to accommodate larger payloads, improving robustness and flexibility of BLE communications. Commit references: - BLE advertising improvements (#4151): 5786066512f65a3fe32072e8601086e71840c164 - BLE: Slightly increase mfg_data size (#4177): 4dd123fd8a9f33769348a29c9f90d00a6ad8341f Overall, no major customer-reported bugs were fixed this month; the work focused on delivering a more capable and resilient BLE feature set. This lays groundwork for broader device compatibility and more secure, flexible pairing with peripherals. Impact and business value: - Broaden BLE interoperability with longer UUIDs and manufacturer data support, enabling more devices to pair and communicate reliably. - Increase robustness of BLE data channels through larger mfg_data buffers, reducing data truncation risks and support for larger payloads. - Set foundation for upcoming security negotiation enhancements during pairing, reducing future rework and risk. Technologies/skills demonstrated: - BLE stack engineering: advertising payloads, UUID handling, manufacturer data handling, and conditional security during pairing - Memory management and buffer sizing for robust peripheral communication - Firmware development practices: incremental commits, code review readiness, and validation of BLE feature work
2 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for flipperdevices/flipperzero-firmware focused on robust BLE improvements and data handling to enhance interoperability and reliability across BLE peripherals. Key changes include support for longer UUIDs in advertising, enablement of manufacturer-specific data handling, and refined pairing with conditional security requests. The mfg_data buffer sizing was increased to accommodate larger payloads, improving robustness and flexibility of BLE communications. Commit references: - BLE advertising improvements (#4151): 5786066512f65a3fe32072e8601086e71840c164 - BLE: Slightly increase mfg_data size (#4177): 4dd123fd8a9f33769348a29c9f90d00a6ad8341f Overall, no major customer-reported bugs were fixed this month; the work focused on delivering a more capable and resilient BLE feature set. This lays groundwork for broader device compatibility and more secure, flexible pairing with peripherals. Impact and business value: - Broaden BLE interoperability with longer UUIDs and manufacturer data support, enabling more devices to pair and communicate reliably. - Increase robustness of BLE data channels through larger mfg_data buffers, reducing data truncation risks and support for larger payloads. - Set foundation for upcoming security negotiation enhancements during pairing, reducing future rework and risk. Technologies/skills demonstrated: - BLE stack engineering: advertising payloads, UUID handling, manufacturer data handling, and conditional security during pairing - Memory management and buffer sizing for robust peripheral communication - Firmware development practices: incremental commits, code review readiness, and validation of BLE feature work
April 2025
February 2025
1 Commits • 1 Features
Feb 1, 2025February 2025: Delivered a new Disney Infinity NFC Card Reading Plugin for the Flipper Zero firmware, enabling faster, more efficient processing of Disney Infinity cards by deriving keys from the card UID and reading card data within the NFC application. The feature is tracked in a single, focused commit and prepared for broader Disney Infinity support in future updates.
February 2025
1 Commits • 1 Features
Feb 1, 2025February 2025: Delivered a new Disney Infinity NFC Card Reading Plugin for the Flipper Zero firmware, enabling faster, more efficient processing of Disney Infinity cards by deriving keys from the card UID and reading card data within the NFC application. The feature is tracked in a single, focused commit and prepared for broader Disney Infinity support in future updates.
December 2024
1 Commits
Dec 1, 2024December 2024: Delivered a reliability-focused fix for Skylander ID reading in flipperzero-firmware. Corrected ID parsing, introduced CRC64-like calculations and tag hashing, and updated key generation to leverage these hashes. The changes improve ID extraction accuracy, parsing robustness, and on-device performance, reducing data-block parsing errors and enabling faster, more reliable hardware identification for end users.
1 Commits
Dec 1, 2024December 2024: Delivered a reliability-focused fix for Skylander ID reading in flipperzero-firmware. Corrected ID parsing, introduced CRC64-like calculations and tag hashing, and updated key generation to leverage these hashes. The changes improve ID extraction accuracy, parsing robustness, and on-device performance, reducing data-block parsing errors and enabling faster, more reliable hardware identification for end users.
December 2024
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Quality Metrics
Correctness85.0%
Maintainability80.0%
Architecture80.0%
Performance75.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
C
Technical Skills
Bluetooth Low Energy (BLE)CryptographyData ParsingEmbedded SystemsFirmware DevelopmentNFCReverse Engineering
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